CACI International
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Senior System Administrator
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CACI International Inc 1 week ago Be among the first 25 applicants Join to apply for the
Senior System Administrator
role at
CACI International Inc Job Category: Information Technology
Time Type: Full time
Minimum Clearance Required to Start: TS/SCI with Polygraph
Employee Type: Regular
Percentage of Travel Required: Up to 10%
Type of Travel: Outside Continental US
Anticipated Posting End: 9/19/2025
CACI is seeking
Systems Administrators
with Linux Infrastructure experience to manage and maintain mission-critical operational IT systems and mission applications in Aurora, CO.
We believe in a healthy home/work balance and our locations offer a wide variety of activities to balance with your work life.
More About This Role
As the Systems Administrator on this contract, you will be on an engineering team that provides IT Systems Administration support to global real-time operational activities. Critical thinking and troubleshooting skills are essential to resolving operational problems and clear communications and briefing skills are essential when communicating with the team, its users, and individuals in leadership roles.
You must be willing/able to work core hours between 6:00 am to 6:00 pm
during the week and participate in on-call rotation for after-hours support
Responsibilities
Provides Tier III support of IT infrastructure systems and custom mission applications based on a Linux environment Create, manage, and maintain accounts and group memberships via Red Hat IPA Experience managing linux-based virtual server environments Hands-on working knowledge of RedHat linux systems Responsible for pro-active systems monitoring and evaluation of environments using Grafana and the documentation, resolution, or escalation of any problems discovered Experience with Linux patching in an operational environment Ensure all Linux systems are running current versions of antivirus software with current virus definition files Ensure all Linux systems are being actively scanned by site provided Tenable software and results are utilized to ensure a secure operational environment
Qualifications
Must have an active TS with ability to obtain a Polygraph Hardware experience: servers, workstations, peripherals Experience installing and configuring various COTS products Experience providing physical and virtual support, maintenance, and security for Red Hat systems Experience with Red Hat IPA Experience with virtualization (Red Hat Virtualization, VMWare, ESXi, VCenter etc.) Experience with NAS Requires deep knowledge of job area typically obtained through advanced education combined with experience. Typically viewed as having a specialty within discipline. May have broad knowledge of project management. Typically has a University Degree (BA/BS) or equivalent experience and minimum 7 years of related work
________________________________________________________________________________________
What You Can Expect
A culture of integrity.
At CACI, we place character and innovation at the center of everything we do. As a valued team member, youll be part of a high-performing group dedicated to our customers missions and driven by a higher purpose to ensure the safety of our nation.
An environment of trust.
CACI values the unique contributions that every employee brings to our company and our customers - every day. Youll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
A focus on continuous growth.
Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground in your career and in our legacy.
Your potential is limitless.
So is ours.
Learn more about CACI here.
________________________________________________________________________________________
Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Learn more here.
Since this position can be worked in more than one location, the range shown is the national average for the position.
The Proposed Salary Range For This Position Is
$90,300-$189,600
CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.
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Seniority level
Mid-Senior level Employment type
Employment type
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Information Technology Industries
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Senior System Administrator
role at
CACI International Inc 1 week ago Be among the first 25 applicants Join to apply for the
Senior System Administrator
role at
CACI International Inc Job Category: Information Technology
Time Type: Full time
Minimum Clearance Required to Start: TS/SCI with Polygraph
Employee Type: Regular
Percentage of Travel Required: Up to 10%
Type of Travel: Outside Continental US
Anticipated Posting End: 9/19/2025
CACI is seeking
Systems Administrators
with Linux Infrastructure experience to manage and maintain mission-critical operational IT systems and mission applications in Aurora, CO.
We believe in a healthy home/work balance and our locations offer a wide variety of activities to balance with your work life.
More About This Role
As the Systems Administrator on this contract, you will be on an engineering team that provides IT Systems Administration support to global real-time operational activities. Critical thinking and troubleshooting skills are essential to resolving operational problems and clear communications and briefing skills are essential when communicating with the team, its users, and individuals in leadership roles.
You must be willing/able to work core hours between 6:00 am to 6:00 pm
during the week and participate in on-call rotation for after-hours support
Responsibilities
Provides Tier III support of IT infrastructure systems and custom mission applications based on a Linux environment Create, manage, and maintain accounts and group memberships via Red Hat IPA Experience managing linux-based virtual server environments Hands-on working knowledge of RedHat linux systems Responsible for pro-active systems monitoring and evaluation of environments using Grafana and the documentation, resolution, or escalation of any problems discovered Experience with Linux patching in an operational environment Ensure all Linux systems are running current versions of antivirus software with current virus definition files Ensure all Linux systems are being actively scanned by site provided Tenable software and results are utilized to ensure a secure operational environment
Qualifications
Must have an active TS with ability to obtain a Polygraph Hardware experience: servers, workstations, peripherals Experience installing and configuring various COTS products Experience providing physical and virtual support, maintenance, and security for Red Hat systems Experience with Red Hat IPA Experience with virtualization (Red Hat Virtualization, VMWare, ESXi, VCenter etc.) Experience with NAS Requires deep knowledge of job area typically obtained through advanced education combined with experience. Typically viewed as having a specialty within discipline. May have broad knowledge of project management. Typically has a University Degree (BA/BS) or equivalent experience and minimum 7 years of related work
________________________________________________________________________________________
What You Can Expect
A culture of integrity.
At CACI, we place character and innovation at the center of everything we do. As a valued team member, youll be part of a high-performing group dedicated to our customers missions and driven by a higher purpose to ensure the safety of our nation.
An environment of trust.
CACI values the unique contributions that every employee brings to our company and our customers - every day. Youll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
A focus on continuous growth.
Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground in your career and in our legacy.
Your potential is limitless.
So is ours.
Learn more about CACI here.
________________________________________________________________________________________
Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Learn more here.
Since this position can be worked in more than one location, the range shown is the national average for the position.
The Proposed Salary Range For This Position Is
$90,300-$189,600
CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.
Seniority level
Seniority level
Mid-Senior level Employment type
Employment type
Full-time Job function
Job function
Information Technology Industries
IT Services and IT Consulting Referrals increase your chances of interviewing at CACI International Inc by 2x Sign in to set job alerts for Senior System Administrator roles.
Centennial, CO $85,000.00-$105,000.00 1 month ago Airport Conveyance Systems Administrator (AGTS) - Denver International Airport
Denver, CO $108,000.00-$115,000.00 6 months ago Aurora, CO $95,023.30-$197,921.98 1 month ago Englewood, CO $100,000.00-$150,000.00 1 month ago Louisville, CO $110,000.00-$150,000.00 11 hours ago Denver, CO $142,000.00-$160,000.00 6 months ago Denver, CO $108,000.00-$115,000.00 6 months ago Denver, CO $142,000.00-$160,000.00 6 months ago Denver, CO $110,000.00-$135,000.00 2 days ago Aurora, CO $61,900.00-$141,000.00 2 minutes ago Windows System Administrator (Onsite - TS/SCI Clearance Required)
Aurora, CO $82,000.00-$164,000.00 1 week ago Broomfield, CO $75,000.00-$101,000.00 1 week ago Senior Systems Administrator - Directory Services, ICAM, & ZTA
Denver, CO $154,000.00-$186,000.00 6 months ago Systems Administrator (Windows / Linux) / Hybrid: Highlands Ranch, CO
Denver, CO $76,000.00-$95,000.00 2 weeks ago Lone Tree, CO $94,345.00-$129,724.00 1 day ago Systems Administrator - User Profile Mgr
Denver, CO $118,000.00-$136,000.00 6 months ago Systems Administrator, Integrated Security
Denver, CO $71,043.00-$100,348.50 5 days ago Were unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr